Over at Page Six, the source of this story states that Disney saw the cut of the movie “they’re not very happy with the what director Gareth Edwards has done”.
While no specific details were given as to what the problem Disney has with this version of Rogue One, the trailer shows a dark tone to the movie. To support the very common practice of reshoots, Disney released a statement to Page Six:
This can play out one way or another. It would be a shame if Rogue One has taken a turn for the worst, but let’s keep our fingers crossed.